EP0367682A3 - Optical switch - Google Patents

Optical switch Download PDF

Info

Publication number
EP0367682A3
EP0367682A3 EP19890403037 EP89403037A EP0367682A3 EP 0367682 A3 EP0367682 A3 EP 0367682A3 EP 19890403037 EP19890403037 EP 19890403037 EP 89403037 A EP89403037 A EP 89403037A EP 0367682 A3 EP0367682 A3 EP 0367682A3
Authority
EP
European Patent Office
Prior art keywords
output optical
branch point
refractive index
waveguides
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890403037
Other languages
German (de)
French (fr)
Other versions
EP0367682A2 (en
EP0367682B1 (en
Inventor
Hisaharu The Furukawa Electric Co. Ltd. Yanagawa
Yoshiyuki The Furukawa Electric Co. Ltd. Kamata
Ken The Furukawa Electric Co. Ltd. Ueki
Hidehisa The Furukawa Electric Co. Ltd Miyazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP27747388A external-priority patent/JPH02125232A/en
Priority claimed from JP12788489A external-priority patent/JPH02308125A/en
Priority claimed from JP18042789A external-priority patent/JPH0345937A/en
Priority claimed from JP1228326A external-priority patent/JP2756154B2/en
Priority claimed from JP23350289A external-priority patent/JPH0396926A/en
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Publication of EP0367682A2 publication Critical patent/EP0367682A2/en
Publication of EP0367682A3 publication Critical patent/EP0367682A3/en
Application granted granted Critical
Publication of EP0367682B1 publication Critical patent/EP0367682B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/31—Digital deflection, i.e. optical switching
    • G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
    • G02F1/3137—Digital deflection, i.e. optical switching in an optical waveguide structure with intersecting or branching waveguides, e.g. X-switches and Y-junctions
    • G02F1/3138—Digital deflection, i.e. optical switching in an optical waveguide structure with intersecting or branching waveguides, e.g. X-switches and Y-junctions the optical waveguides being made of semiconducting materials

Abstract

An optical switch includes at least one input optical semiconductor waveguide (5); two output optical semiconductor waveguides (3a , 3b) connected at a branch point to the input optical waveguide and diverging from the branch point (2) with a preset angle ϑ (degree) therebetween; and a refractive index controlling section (4) disposed in position on at least one of the output optical waveguides (3a) and apart from the branch point (2), for electrically causing the refractive index of the output optical waveguideto be reduced. A light attenuating layer for preventing radiation mode light leaked from a portion near the branch point to the outside of the optical waveguide from being re-combined with guided mode light in the output optical waveguide is disposed between the two output optical waveguides. The refractive index controlling section (4) is formed so that a length from the physical branch point between said two output optical waveguides to an output end portion of the refractive index controlling section may be set equal to or larger than 100 x ϑ/cos (ϑ/2) µm. A distance between the nearest portions of the refractive controlling sections of the output optical waveguides is set to be equal to or less than twice a spot size so as to improve the extinction ratio and excessive loss.
EP89403037A 1988-11-04 1989-11-03 Optical switch Expired - Lifetime EP0367682B1 (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP27747388A JPH02125232A (en) 1988-11-04 1988-11-04 Optical switch
JP277473/88 1988-11-04
JP127884/89 1989-05-23
JP12788489A JPH02308125A (en) 1989-05-23 1989-05-23 Waveguide type optical switch
JP18042789A JPH0345937A (en) 1989-07-14 1989-07-14 Optical switch
JP180427/89 1989-07-14
JP1228326A JP2756154B2 (en) 1989-09-05 1989-09-05 Light switch
JP228326/89 1989-09-05
JP233502/89 1989-09-08
JP23350289A JPH0396926A (en) 1989-09-08 1989-09-08 Optical switch

Publications (3)

Publication Number Publication Date
EP0367682A2 EP0367682A2 (en) 1990-05-09
EP0367682A3 true EP0367682A3 (en) 1991-06-12
EP0367682B1 EP0367682B1 (en) 1996-06-05

Family

ID=27527158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89403037A Expired - Lifetime EP0367682B1 (en) 1988-11-04 1989-11-03 Optical switch

Country Status (4)

Country Link
US (2) US5033811A (en)
EP (1) EP0367682B1 (en)
CA (1) CA2002098C (en)
DE (1) DE68926605T2 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033811A (en) * 1988-11-04 1991-07-23 The Furukawa Electric Co., Ltd. Optical switch
US5422967A (en) * 1989-01-30 1995-06-06 Hitachi, Ltd. Self-routing optical switch and optical switch array
JP3102874B2 (en) * 1990-11-05 2000-10-23 日本板硝子株式会社 Y-branch optical circuit
FR2678744A1 (en) * 1991-07-05 1993-01-08 Alsthom Cge Alcatel OPTICAL SWITCH WITH ELECTRICAL CONTROL.
US5166991A (en) * 1991-09-11 1992-11-24 The University Of British Columbia Electro-optic switch with resonator electrode
US5369718A (en) * 1991-10-15 1994-11-29 The Furukawa Electric Co., Ltd. Total internal reflection-type optical waveguide switch
CA2136752C (en) * 1992-06-26 2003-04-15 James Charles Brown, Jr. Multi-branch digital optical switch
AU654033B2 (en) * 1992-08-26 1994-10-20 Alcatel N.V. Electrically controlled optical switch
DE4312568A1 (en) * 1993-04-17 1994-10-20 Sel Alcatel Ag Optical hybrid switch
NL9400266A (en) * 1994-02-22 1995-10-02 Nederland Ptt Method and Associated Pair of Mask Patterns for Manufacturing Integrated Optical Waveguide Structures Using Double Masking.
US5524154A (en) * 1994-08-31 1996-06-04 At&T Corp. Hybrid architecture for an optical switching fabric implemented with 1×2 switching devices
JP2705664B2 (en) * 1995-09-18 1998-01-28 日本電気株式会社 Light switch
DE19549245C2 (en) * 1995-12-19 2000-02-17 Hertz Inst Heinrich Thermo-optical switch
US6473541B1 (en) 1999-09-15 2002-10-29 Seng-Tiong Ho Photon transistors
US6298180B1 (en) 1999-09-15 2001-10-02 Seng-Tiong Ho Photon transistors
US6526193B1 (en) * 2000-11-17 2003-02-25 National Research Council Of Canada Digital optical switch
US6510260B2 (en) * 2001-01-02 2003-01-21 Finisar Corporation, Inc. N×N optical switching device based on thermal optic induced internal reflection effect
US6782154B2 (en) 2001-02-12 2004-08-24 Rensselaer Polytechnic Institute Ultrafast all-optical switch using carbon nanotube polymer composites
US6778736B2 (en) 2001-03-15 2004-08-17 Finisar Corporation Dynamic variable optical attenuator and variable optical tap
US20020136525A1 (en) * 2001-03-23 2002-09-26 Jian-Jun He Variable optical attenuator using waveguide modification
GB0119369D0 (en) * 2001-08-08 2001-10-03 Bookham Technology Plc Optic system
US7426346B2 (en) 2002-08-01 2008-09-16 Finisar Corporation System and method for preventing signal loss in an optical communications network
US7212738B1 (en) 2002-08-01 2007-05-01 Finisar Corporation Preventing signal loss in an optical communications network
US7072538B1 (en) 2002-11-13 2006-07-04 Finisar Corporation Planar reconfigurable optical add/drop module
US7447397B1 (en) 2004-06-14 2008-11-04 Dynamic Method Enterprises Limited Optical switch matrix
US7397989B2 (en) * 2004-09-21 2008-07-08 Dynamic Method Enterprises Limited Optical switches
CN107346047B (en) * 2016-05-04 2020-04-21 华为技术有限公司 Optical switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988007220A1 (en) * 1987-03-17 1988-09-22 Bell Communications Research, Inc. Electro-optical switch
US4813757A (en) * 1986-11-26 1989-03-21 Hitachi, Ltd. Optical switch including bypass waveguide

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210980C2 (en) * 1981-04-01 1986-11-20 Nippon Telegraph And Telephone Corp., Tokio/Tokyo Optical switching element and optical switching matrix
JPS60149030A (en) * 1983-12-21 1985-08-06 Nec Corp Photoswitch
JPS60217346A (en) * 1984-04-13 1985-10-30 Oki Electric Ind Co Ltd Optical switch of waveguide type
US4784451A (en) * 1984-08-10 1988-11-15 Hitachi, Ltd. Waveguide optical switches
JPH0685035B2 (en) * 1986-01-29 1994-10-26 株式会社日立製作所 Light switch
JPS6371826A (en) * 1986-09-16 1988-04-01 Hitachi Ltd Optical semiconductor device
FR2608783B1 (en) * 1986-12-23 1989-04-14 Labo Electronique Physique OPTICAL SWITCHING ELEMENT BETWEEN TWO LIGHT GUIDES AND OPTICAL SWITCHING MATRIX FORMED FROM SUCH SWITCHING ELEMENTS
JPH0721594B2 (en) * 1987-01-19 1995-03-08 国際電信電話株式会社 Light switch
JPH01107238A (en) * 1987-10-21 1989-04-25 Oki Electric Ind Co Ltd Optical circuit element
JPH01140133A (en) * 1987-11-27 1989-06-01 Hitachi Ltd Optical switch device
US5033811A (en) * 1988-11-04 1991-07-23 The Furukawa Electric Co., Ltd. Optical switch
US5004447A (en) * 1989-09-06 1991-04-02 The United States Of America As Represented By The Secretary Of The Air Force Low loss semiconductor directional coupler switches including gain method of switching light using same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4813757A (en) * 1986-11-26 1989-03-21 Hitachi, Ltd. Optical switch including bypass waveguide
WO1988007220A1 (en) * 1987-03-17 1988-09-22 Bell Communications Research, Inc. Electro-optical switch

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 80 (P-441)[2137], 29th March 1986; & JP-A-60 217 346 (OKI DENKI KOGYO K.K.) 30-10-1985 *
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 349 (P-911)[3697], 7th August 1989; & JP-A-1 107 238 (OKI ELECTRIC IND. CO., LTD) 25-04-1989 *
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 391 (P-926)[3739], 30th August 1989, & JP-A-1 140 133 (HITACHI) 01-06-1989 *

Also Published As

Publication number Publication date
DE68926605D1 (en) 1996-07-11
US5148505A (en) 1992-09-15
CA2002098A1 (en) 1990-05-04
US5033811A (en) 1991-07-23
DE68926605T2 (en) 1996-11-14
CA2002098C (en) 2000-01-11
EP0367682A2 (en) 1990-05-09
EP0367682B1 (en) 1996-06-05

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